Heroes of the Lance is based on the first Dragonlance campaign and novel. The party journeys through the ruined city of Xak Tsaroth, face the ancient dragon Khisanth and retrieve the Disks of Mishakal. The interface is setup as a side scroller and only one member of the party is controlled at once. Heroes of the Lance was not part of the Gold Box series; the nickname for these other D&D titles were "Silver Box" games.
In the run Randil blitzes through everything, not taking the time to kill or even hit any of the regular enemies. The spell being cast most of the time is Protection From Evil. This creates short term invulnerability and allows for jumping through enemies.